Directional Frequency Analysis and Recording System is a passive acoustic sensor for detecting, localizing and tracking a
submarine. The SSQ-77C Vertical Line Array is a passive directional buoy with multiple hydrophones in a vertical column
and can be used as a multistatic receiver or a passive sensor.

The SSQ-62E Directional Command Activated Sonobuoy System
is an active sensor used to provide terminal positioning data
during the attack phase by transmitting active sound and
determining range and bearing to a contact.

The SSQ-101 Air Deployable Active Receiver is a commandable, passive acoustic sonobuoy with a horizontal planar array.
The SSQ- 125 is the coherent source sonobuoy used in the
Multistatic Active Coherent (MAC) Air ASW system. It replaces
the SSQ- 110 used with previous impulsive multistatic systems.

The SSQ- 125 produces electronic (coherent) pulses of
various types and lengths that enable Doppler processing to
distinguish moving targets (e.g., submarines) from stationary
features of the environment (e.g., shipwrecks). This capability
will enable the detection of targets in shallow water environments involving a rough ocean floor. In a planned second
phase of MAC development, the power source for the SSQ- 125
will be increased, enabling it to attain the long-range search
capabilities required for deep convergence zone environments.
High-altitude ASW will integrate modified sonobuoy sensors
to enhance the P-8A capability to conduct its mission at altitudes higher than traditional fixed-wing airborne ASW, thereby
enabling greater communications range.

UNMANNED UNDERSEA SYSTEMS

ADVANCED DEVELOPMENT UUV (ADUUV)

BRIEFING: As a risk-reduction effort for the torpedo-tube-launched 21-inch MRUUVs (Mission Reconfigurable Unmanned
Underwater Vehicles), the Navy awarded Lockheed Martin
Maritime Systems & Sensors a contract in 2003 to design a
single prototype ADUUV. It is the first Navy UUV designed to
accommodate interchangeable modular mission payloads that
can be swapped out at sea. The single prototype is being used
as a test bed for future UUV payloads.

CONTRACTOR: . . . . . . . . . . Lockheed Martin Corp.

LARGE-DISPLACEMENT UUV (LDUUV)

BRIEFING: The planned LDUUV is designed to take full advantage of the 88-inch-diameter, 40-foot-long vertical launch
tubes of the four Trident ballistic-missile submarines the Navy is
converting into guided-missile attack subs. The LDUUV will have
a diameter of more than 3 feet. It will offer far greater range and
payload than the 21-inch MRUUV and, with ample room for batteries, could potentially operate autonomously for several weeks.

The LDUUV would carry a variety of sensor and weapon payloads.

The Navy released its requirements in 2014 for a new class
of LDUUV “to provide increased endurance, long range, and
payload hosting. The LDUUV will be a modular, open architecture, reconfigurable UUV delivered in increments. The
Increment 1 LDUUV will have mission capabilities to include
Intelligence Preparation of the Operational Environment and
below-water ISR to improve battlespace awareness. Future
increments are expected to include mission payloads to provide above-water ISR, mine countermeasures and payload
deployment. LDUUV Increment 1 will be capable of launch and
recovery by LCS (Independence and Freedom classes) and submarine (via Virginia class) Payload Modules or Modernized Dry
Deck Shelter.” Milestone A approval to transition development
to a full program was granted in September 2015.

DEVELOPER:. . . . . . . . . . . . . Naval Undersea Warfare Center

MK18 MOD 1 SCULPIN UUV

BRIEFING: The surface-launched, battery-powered Sculpin,
based on the Remus 100, is a small, autonomous, bottom-mapping UUV that can scout for mines in advance of Navy
explosive ordnance disposal divers. It was used during Operation Iraqi Freedom in mine-clearance operations in the port
of Umm Qasr. It is to be included in the LCS mine warfare
mission package.

CON TRAC TOR: . . . . . . . . . . Kongsberg Hydroid

MK18 MOD 2 KINGFISH UUV

BRIEFING: The Kingfish is a Remus 600 UUV equipped with a
side-scan sonar to detect mines and other objects underwater.
It was deployed to the Persian Gulf in 2012. It can be deployed
from an 11-meter rigid-hull inflatable boat (RHIB).